php curl_init函数用法详解说明

??php
// 初始化一个 cURL 对象
$curl = curl_init();

// 设置你需要抓取的URL
curl_setopt($curl, CURLOPT_URL, ‘http://www.cmx8.cn’);

// 设置header
curl_setopt($curl, CURLOPT_HEADER, 1);

// 设置cURL 参数，要求结果保存到字符串中还是输出到屏幕上。
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

// 运行cURL，请求网页
$data = curl_exec($curl);

// 关闭URL请求
curl_close($curl);

// 显示获得的数据
var_dump($data);

?>

 
!extension_loaded(‘curl’) && die(‘The curl extension is not loaded.’);  
 
$discuz_url = ‘http://www.111cn.net’;//论坛地址  
$login_url = $discuz_url .’/logging.php?action=login’;//登录页地址  
$get_url = $discuz_url .’/my.php?item=threads’; //我的帖子  
 
$post_fields = array();  
//以下两项不需要修改  
$post_fields['loginfield'] = ‘username’;  
$post_fields['loginsubmit'] = ‘true’;  
//用户名和密码，必须填写  
$post_fields['username'] = ‘lxvoip’;  
$post_fields['password'] = ’88888888′;  
//安全提问  
$post_fields['questionid'] = 0;  
$post_fields['answer'] = ”;  
//@todo验证码  
$post_fields['seccodeverify'] = ”;  
 
//获取表单FORMHASH  
$ch = curl_init($login_url);  
curl_setopt($ch, CURLOPT_HEADER, 0);  
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);  
$contents = curl_exec($ch);  
curl_close($ch);  
preg_match(‘//i’, $contents, $matches);  
if(!empty($matches)) {  
   $formhash = $matches[1];  
} else {  
   die(‘Not found the forumhash.’);  
}  
 
//POST数据，获取COOKIE  
$cookie_file = dirname(__FILE__) . ‘/cookie.txt’;  
//$cookie_file = tempnam(‘/tmp’);  
$ch = curl_init($login_url);  
curl_setopt($ch, CURLOPT_HEADER, 0);  
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);  
curl_setopt($ch, CURLOPT_POST, 1);  
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_fields);  
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file);  
curl_exec($ch);  
curl_close($ch);  
 
//带着上面得到的COOKIE获取需要登录后才能查看的页面内容  
$ch = curl_init($get_url);  
curl_setopt($ch, CURLOPT_HEADER, 0);  
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);  
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file);  
$contents = curl_exec($ch);  
curl_close($ch);  
 
var_dump($contents);

function crawl_dou_request($url,$timeout=1){//php 模拟get
ob_start();
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_USERAGENT,”MISE 6.0″);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT,$timeout);
$file_msg = curl_exec($ch);
curl_close($ch);
return $file_msg;
}